Double-acting tail gate for dump trucks



Nov. 12,1929. H c. 1.. NEIN DOUBLE ACTING I'AIL GATE FOR DUMP TRUCKS Original Filed Feb. 1, 1927 2 Sheets-Sheet l katented Nov. 12, 1929 eHA'RLEs L. NEINQOF'ALLENTOWN, PENNSYLVANIA, AssieNon T0 INTERNATIONAL MOTOR COMPANY, on EW YORK, N. Y., A CORPORATION or DELAWARE DOUBLE-ACTING TAIL GATE FOR DUMP TRUCKS Original application filed February 1, 1927, Serial No. 165,057. Divided and this application filed Serial No. 227,427.

This invention relates to tail gates for dump trucks and to hinging and locking means therefor of the type set forthand disclosed in my co-pending application Serial 5 N 0. 165,057 filed February 1, 1927. This application relates specifically tothe automatic means for releasing the bottom of the gate carried with the truck when the body of the truck is raised. It is proposed to provide 10 what may be termed a double acting tail gate for use on dump'trucks, for instance, which is held in position by means of specially designed hooks mounted upon the body of the truck and co-operating with pins carried at both upperand lower corners of the gate. According to the modification of the invention to which this application is particularly addressed the hooks which hold the top of the gate in position are provided with manually operable means to release the'pins so that the gate may be swung downwardly while the hooks which hold thefpins at the bottom of the gate in position are provided with means whereby the pins may be automatically released and the gate swung outwardly as the body of the truckis being raised. These means are, further, preferably ofsuch a nature that when the body of the truck is lowered the hooks will automatically engage the 0 pins and bring the gate into closed position.

F or a complete understanding of'the invention reference should be hadto the following detailed description thereof and to the accompanying drawings in which:

Figure 1 is a view in side elevation of a tail gate according to this invention and showing the hooking means and actuating'mech anism therefore; and

Figure 2is an end elevation of the same. Figure 3 indicates a modification of the means for mounting the gate at its upper end.

'In Figure 1 there is illustrated at a' the rear end ofa dump truck body to which the tail gate 9 is to be applied. There is fastened to each end of the top of'the tail gate 9 a pin p by means of the brackets c which are fixed upon the tail gate as by the rivets d. Pins 12" are similarly attached at each 'body by the pins it. portions 7L formed on the inner side thereof ent hereinafter.

it. through the rod 2'.

October end of thebottom of the tail gate as by the brackets 0' and the rivets (5.

At each end of the top of the dump body are riveted the rests f which are bifurcated as at f, 7". Between the bifurcated ends of the rests f are pivoted locking hooks Z as by the pintle Z. At one end of the hook Z there is pinned a link m, as by the pin of. Over the end of the link m is disposed the sleeve 'm' which abuts against the end of the stop m on the end of the link. Within the sleeve m is disposed a spring m and in the end of the sleeve is pinnedthe link m which is also pinned to one end of the bent lever handle n. The bent lever handle a is keyed to the shaft a which is journaled in bearings n at both sides under the-body. Atthe other side of the body the shaft n is connected with the locking hook Z in an identical manner as that ,just'described except that the handle lever 7 may be omitted. V v

Atboth ends of the bottom of the dump body are riveted the rests e. The bent'hooks 7L are'pinned at one side of the restse to the The bent hooks it have for a purpose which will become more appar- To the other end of the bent hookhis pinned the link 2' as by'the pin 2" and this link is in'turn pinned to an arm j keyed to the shaft k which is journaled in bearings '70 carried with the body. The shaft is also has keyed thereto the arm o to which is. pinned the buckle s which is attached to a point on the chassis frame gas by the, chain 3 The arm'r is held in the position indicated in thefdrawings against the action of V the spring a by the chain 8 the sp'ringz tending to .pull the arm 7" to the right when the chain si'isslackened. When thebo'dy. israised about its pivot point w the rearward part of the body will move downwardly releasing the tensionon the chain 8 and allowing the spring a to pull the arm r. to the right, thereby turning the shaft is. The arms 7' will move to the right as the shaft 70 turns thereby releasing the pins 10' by swinging the hooks it about the pivots The gate, as will be apparent, will swing outwardly of its own accord about the pins 29 at the top. When the body is lowered about its pivot 02 the gate will close automatically, the chain .9 pulling the link r downwardly, the parts being so arrangeduthatthehooks it resume the position showniin .Figurel as the pins 39 drop into position against the rests e. As the gate is closing and when it is in almost closed position the relation of parts is such that the edges k on the h-ooks-h'will come into contact-with the pins p and force the gate, into completely closed position.

. .ilfitisdesiredto open thetail gate by: releasing the top all that is necessaryds to pull downwardly on the handle a. This will .swin-g the-hooksl about-.thepivots'l releasing the pins 20 at the top of the gatezand per- .mittin -g the latter to swing downwardly about ,thepinsp atthebottom. =When it is desired .to: close the gate. the hooks Z may be returned .to-locking position first and the gate-then :swung upwardly. :The pins p will press .pin mounted rigidly on the body, said rest comprising'horizontal and vertical portions,

a 1 book pivoted on :the .body,-.and means to vswingthe. hook about its pivot to secure the pin against the rest, said means comprising a resilient. member to receive :iforces exerted uponsaizdhook incident to. movement of the pin whereby:breakageisprevented.

This specification signed this Ath day of .August, A.;D. z1927.

iGH'A-RLES .L. NEIN.

.against the inclined edges Z of the hooks raisingthe latter against :the action of the spring 11172. and permittingrthe; pins 1) to pass beneath ,ithepointltan'd into position. The hooks will then-snap back into locking position due to :the action, of the springs-m :It will be noted that the hooks Z are prevented from inadvertently releasing-the pins qy, except when the handle Wis-pulled d0wnw'ardly,1fdue to the fpast center condition ofthe links m and the arms m which, thus forms an effective looking means.

. It-frequently. happens. in using dump bodies that while the tail gate is open at the bot .tomlthestruek is-ina'dvertently backed into a wall orportion of. the dumped load,:,the gate .being forced upwardly. In order to; prevent breakage. ofi the pinsp or. the hooks lor the rests f,.the rests fimay be forme'das ind-i- .cated,inFigure 3, at f so. that the gate may be forced upwardly, thehooks Z yielding=to ,theextentpermitted bythe spring m?',:and thus preventingbreakage.

It will thus be seen thatthere has been; provided-for use on dump truck bodies a double acting tail ,gate which may be swungteither upwardly or. downwardlyaccording to which 'ofthe sets of pins ordinarily usedto retain it in place have beenr-eleased; in which a sim 'ple,- manually controlled releasing means has 'been suppliedforthe locking devices usedto I "retainthepins on the top of the gate in place and which means may act. as. snap catches; and in which automatic means have beenpro- 'videditor releasing the ,means to ordinarily retain the pins carried with the bottom of the 60 gate inplace as the body of the truck is being raised. 'There have also been providedmeans' Ii'forilocking the. hook releasing mechanism as vwell as means to, prevent breakage of the parts at the top of the gate when subjected to undue 65 stresses during unloading. I .The :entire "ar- 

